Federal 180gr Nosler Partition. In my experience, the Partition has never failed close and far, standard or horse power calibers. Other bullets have better certain characteristics for bullets but the Partition for me has done it all; always flew true, drove deep, expanded, held together.
I prefer a light weight simple sling, no padding or extra width. The rifle is hooked and carried on my pack, not on my shoulder, 90% of the hunt.
Over the last few years, bipods on hunting rigs have become more popular. To me, they add unwanted weight, I already have a pack, use it, I have a trekking pole, use it.
Sling sticks are a option, I think it comes to understanding what they and not trying to do what they are not. I have never used them but sold them by the truck load with way more love for them than hate. But, like I said, last few years their popularity has fallen for bipods. Only you can decided if they work for you.